Improvement in screw-cutting die-stocks



UNITED STATES PATENT OFFICE.

TRUMAN H. ROSE, OF MILLERS FALLS, MASSACHUSETTS, ASSIGNOR TO HIMSELF ANDJAMES W. ANTHOINE, OF SAME PLACE.

IMPROVEMENT lN SCREW-CUTTING DIE-STOCKS.

Specification forming part of Letters Patent No. 207,446, dated August27,1878; application filed July 19, 1878.

To all whom it may concern:

Be it known that I, TRUMAN H. Rose, of Millers Falls, of the county ofFranklin, of the State of Massachusetts, have invented a new and usefulImprovement in Sorew-Cuttin g Die-Stocks; and do hereby declarethe sameto be described in the following specification and represented in theaccompanying drawings, of which- Figures 1 and 2 are opposite sideviews, Fig. 3 a longitudinal section, and Fig. 4 a transverse section,of a screw die-stock provided with my invention.

In this stock there are between the handles, and duly applied to them,one stationary and one pivoted die-carrier, and on the shank of thestationary carrier there are a screw and a nut for confining suchdie-carriers together and for enabling the pivoted or movable one to bemoved apart from the other. Furthermore, each carrier supports aseparate die and guide or mouth-piece, and such die-carriers areprovided with an adjustable stop for regulating the distance of the diesapart, as occasion may require, in the process of cutting or forming amale screw-thread upon a rod. After a screw-thread may have been so outthe nut may be turned back, so as to set free the pivoted carrier andallow it to be moved away from its fellow, in order for the stock to bereadily separated from the rod without the necessity of screwing backthe stock thereon.

In the drawings, A A are the two separate dies, and B B the separateguides therefor, such dies and guides being arranged, as shown, in andfixed to the two die-carriers G G. The carrier 0 is fastened to andarranged between two handles, D D, and has upon its shank a a malescrew, 1), on which is screwed a long cylindrical nut, E, which has aconical recess or socket, c, in its inner end, to receive the free endor wedged part 02 of the movable car rier O. This latter carrier, at ornear its other end, is hinged or pivoted to the carrier 0, so as to becapable of being moved from the position shown in full lines in Fig. 1into that shown in dotted lines in such figure.

On screwing up the nut E the wedged part (I of the movable carrier 0will enter the conical socket of the nut, and by the action of the nutagainst it the carrier will be forced firmly against the stop F, to behereinafter described.

Furthermore, there is screwed into and through the shank of thestationary carrier 0 a screw or adjustable stop, F, whose inner end isconical, to enter a corresponding recess, 6, in the movable carrier. Thescrew, besides serving to regulate the distance of the dies apart, aidswith the recess in sustaining the movable carrier while the stock may bein use.

I claim- 1. The screw die-stock consisting of the two die-carriers C 0,provided with handles D D, and pivoted or hinged together, and a screw,b, and socketed nut E, applied to the shank of one and to operate withthe other of such carriers, all being substantially as set forth.

2. The combination of the separate screwcutting dies A A and theseparate guides B B therefor with the two die-carriers G O, hingedtogether, and provided with the screw 12, socketed nut E, and thehandles D D, all being substantially as set fort 3. The screw F and therecess 6, in combination with the two hinged die-carriersO O,the screw1), and the socketed nut E, all being arranged and applied substantiallyas set forth.

TRUMAN H. ROSE.

Witnesses:

I. N. RooT, EMMA S. BARTLETT.

